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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Influence of A-site Gd doping on the microstructure and dielectric properties of Ba(Zr_(0.1)Ti_(0.9))O_3 ceramics
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Influence of A-site Gd doping on the microstructure and dielectric properties of Ba(Zr_(0.1)Ti_(0.9))O_3 ceramics

机译：A位Gd掺杂对Ba（Zr_（0.1）Ti_（0.9））O_3陶瓷微观结构和介电性能的影响

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摘要

Pure and Gd-doped barium zirconate titanate (BaZro.1Tio.9O3 , BZT) ceramics were prepared by solid state reaction method. Phase analysis showed the formation of the pyrochlore phase (Gd_2Ti_2O_7) at about 5 mol% Gd doping in BZT. The microstructural investigation on the sintered ceramics showed that Gd doping significantly reduced the grain size of pure BZT ceramics, from about 100 ìm to 2-5 ìm. Change in the Gd concentration had minor influence on the grain size and on morphology. An increase in the Gd content decreased the Curie temperature [T_c) of the BZT ceramics. The maximum dielectric constant at T_c was observed for 2 mol% Gd and with further increase in Gd content the dielectric constant at T_c decreased. The dielectric constant was significantly improved compared to that of pure BZT ceramic. Tunable dielectric materials with good dielectric properties can be prepared by doping BZT with Gd.
机译：通过固态反应法制备了纯的和掺Gd的锆酸钛酸钡（BaZro.1Tio.9O3 ，BZT）陶瓷。相分析表明在BZT中掺杂了约5 mol％的Gd时形成了烧绿石相（Gd_2Ti_2O_7）。对烧结陶瓷的微观结构研究表明，掺Gd可以显着减小纯BZT陶瓷的晶粒尺寸，从大约100μm减小到2-5μm。 Gd浓度的变化对晶粒尺寸和形态几乎没有影响。 Gd含量的增加降低了BZT陶瓷的居里温度[T_c]。对于2mol％的Gd，观察到T_c处的最大介电常数，并且随着Gd含量的进一步增加，T_c处的介电常数降低。与纯BZT陶瓷相比，介电常数得到了显着改善。可以通过在BZT中掺入Gd来制备具有良好介电性能的可调谐介电材料。

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